Powermate Vx PLA1683066 30-Gallon Portable Twin Cylinder Cast Iron Air Compressor Includes an Oil Lubricated Pump with a One-Piece Cast Iron Crankcase Features a Thermally Stable Cast Iron Cylinder Body Includes Automotive Style Ball Bearings and Durable Stainless Steel Reed Valves Offers a Easily Accessible Oil Fill and 10-Inch Cast Iron Balanced Fly Wheel Includes an Aluminum Head and Machined Cast Iron Valve Plate